Vulnerability Report

CVE-2026-34179

Title: Canonical LXD Privilege Escalation via Certificate Update

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-34179.

CWE Category CWE-915
Published Date Apr 09, 2026
Modified Date Apr 22, 2026
Exploit Status Not Found
Score 9.1 CVSS v3.1
Exploit Probability (EPSS)
0.27%

Vulnerability Summary

CVE-2026-34179: In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.

Impacted Vendors

C
canonical 1
L
linuxcontainers 1

Reference Links

https://github.com/canonical/lxd/pull/17936 https://github.com/canonical/lxd/security/advisories/GHSA-c3h3-89qf-jqm5
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-34179 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Stack

No specific products linked.